use crate::db::{NotificationId, NotificationKindId, UserId};use sea_orm::entity::prelude::*;use time::PrimitiveDateTime; #[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "notifications")]pub struct Model {    #[sea_orm(primary_key)]    pub id: NotificationId,    pub created_at: PrimitiveDateTime,    pub recipient_id: UserId,    pub kind: NotificationKindId,    pub entity_id: Option<i32>,    pub content: String,    pub is_read: bool,    pub response: Option<bool>,} #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]pub enum Relation {    #[sea_orm(        belongs_to = "super::user::Entity",        from = "Column::RecipientId",        to = "super::user::Column::Id"    )]    Recipient,} impl ActiveModelBehavior for ActiveModel {}